Marco Polo continues his narrative thus:--"The inner wall has five gates on the south side, answering to those in the outer wall, but on the other sides the walls have only one gate each. In the centre of the enclosure made by these walls, stands the palace, the largest in the world. It has no second story, but the ground-floor is raised about eight feet above the ground. The roof is very high, the walls of the rooms are covered with gold and silver, and on this gold and silver are paintings of dragons, birds, horses, and other animals, so that nothing can be seen but gilding and pictures. The dining-hall is large enough to hold 6000 men, and the number of other rooms is marvellous, and all is so well arranged that it could not be improved. The ceilings are painted vermillion, green, blue, yellow, and all kinds of colours, varnished so as to shine like crystal, and the roof is so well built that it will last for many years. Between the two walls the land is laid out in fields with fine trees in them, containing different species of animals, the musk-ox, white deer, roe-buck, fallow-deer, and other animals, who fill the space between the walls, except the roads reserved for human beings. On the north-western side is a great lake, full of fishes of divers kinds, for the great khan has had several species placed there, and each time that he desires it to be done, he has his will in it. A river rises in this lake and flows out from the grounds of the palace, but no fish escape in it, there being iron and brass nets to prevent their doing so. On the northern side, near an arched doorway, the emperor has had a mound made, a hundred feet in height and more than a mile in circumference; it is covered with evergreen trees, and the emperor, being very fond of horticulture, whenever he hears of a fine tree, sends for it and has it brought by his elephants, with the roots and surrounding soil, the size of the tree being no impediment, and thus he has the finest collection of trees in the world. The hill is called 'green hill,' from its being covered with evergreen trees and green turf, and on the top of the hill is a house. This hill is altogether so beautiful that it is the admiration of every one."